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Table 2 Difference of GSI quantitative parameters between glioma recurrence and treatment-related changes

From: Dual-energy spectral CT quantitative parameters for the differentiation of Glioma recurrence from treatment-related changes: a preliminary study

GSI quantitative parametersglioma recurrencetreatment related changesP Value
Precontrast λHU−0.007(− 0.477, 0.494)−0.064(− 0.619, 0.310)0.859
Precontrast Zeff7.545 (7.353, 7.745)7.520 (7.295, 7.653)0.723
Precontrast Zeff-N1.007 (0.996, 1.012)1.005 (0.997, 1.012)0.965
Precontrast IC−0.108(−2.598, 2.649)−0.375(− 3.33, 1.428)0.790
Precontrast ICN0.733 (0.509, 1.102)0.969 (0.504, 1.086)0.723
Venous phase λHU1.426 ± 0.7620.314 ± 0.373< 0.001
Venous phase Zeff8.034 ± 0.2387.671 ± 0.151< 0.001
Venous phase Zeff-N1.058 ± 0.0201.013 ± 0.024< 0.001
Venous phase IC7.319 ± 3.9671.703 ± 2.049< 0.001
Venous phase ICN0.636(−2.140, 3.514)0.827(− 0634, 1.740)0.832
  1. All P values for group comparisons were obtained by t test
  2. Data in parentheses are medians with interquartile range